- Resembling a shield; denoting a gland (thyroid gland) and a cartilage of the larynx (thyroid cartilage) having such a shape.
- The cleaned, dried, and powdered thyroid gland obtained from one of the domesticated animals used for food and containing 0.17–0.23% of iodine; formerly widely used in the treatment of hypothyroidism, cretinism, and myxedema, in some cases of obesity, and in skin disorders.
[G. thyreoeides, fr. thyreos, an oblong shield, + eidos, form]
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Examples: glitazone, GI cocktail, etc.